Soon, warnings will be suppressed by default and won't causes a failure.
Therefore to prevent loss of coverage, we need to make sure that any
lint warning that causes a failure today, needs to be converted to an
error so it keeps failing tomorrow.
Depends on D3819
Differential Revision: https://phabricator.services.mozilla.com/D3820
--HG--
extra : moz-landing-system : lando
This is a bustage fix that needs to get out quickly. Once landed we can take
the time to enable it on more directories, or preferably change it to a
blacklist.
MozReview-Commit-ID: Gbf7q2L0tg3
--HG--
extra : rebase_source : a58ae64c655b24e686710a663d4538b4cfe020f7